我正在学习BroadCast接收器。我尝试使用以下代码实现的是,当我切换到飞行模式时,无论是否开启应用程序,我都希望看到一个敬酒。我在做什么/做错了什么?请帮忙。谢谢
ConnectivityChangedReceiver.java类
import android.content.BroadcastReceiver;
import android.content.Context;
import android.content.Intent;
import android.net.ConnectivityManager;
import android.net.NetworkInfo;
import android.widget.Toast;
public class ConnectivityChangedReceiver extends BroadcastReceiver {
@Override
public void onReceive( Context context, Intent intent )
{
Toast.makeText(context, "Intent Detected.", Toast.LENGTH_LONG).show();
}
}
AndroidManifest.xml
<?xml version="1.0" encoding="utf-8"?>
<uses-permission android:name="android.permission.READ_PHONE_STATE"></uses-permission>
<action android:name="android.intent.action.BOOT_COMPLETED" />
<uses-permission android:name="android.permission.SEND_SMS"/>
<application
android:allowBackup="true"
android:icon="@mipmap/ic_launcher"
android:label="@string/app_name"
android:supportsRtl="true"
android:theme="@style/AppTheme">
<activity android:name=".MainActivity">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>
<receiver android:name=".ConnectivityChangedReceiver">
<intent-filter>
<action android:name="android.intent.action.AIRPLANE_MODE">
</action>
</intent-filter>
</receiver>
</application>
MainActivity.java`
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.content.Intent;
import java.util.ArrayList;
public class MainActivity extends AppCompatActivity {
private TextView switchStatus;
private Switch mySwitch;
@Override
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
}
}
因此,我刚刚找到了解决上述问题的方法。我变了
<receiver android:name=".ConnectivityChangedReceiver">
至
<receiver android:name="ConnectivityChangedReceiver">
(名称开头不带“。”。希望它对陷入困境的人有所帮助!
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